KR100907417B1 - Electron emission device for back light unit and liquid crystal display thereof - Google Patents

Electron emission device for back light unit and liquid crystal display thereof Download PDF

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KR100907417B1
KR100907417B1 KR1020070079524A KR20070079524A KR100907417B1 KR 100907417 B1 KR100907417 B1 KR 100907417B1 KR 1020070079524 A KR1020070079524 A KR 1020070079524A KR 20070079524 A KR20070079524 A KR 20070079524A KR 100907417 B1 KR100907417 B1 KR 100907417B1
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cathode
signal
pulse
gate
transmitted
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KR1020070079524A
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KR20090015300A (en
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이진석
이지원
조덕구
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삼성에스디아이 주식회사
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Priority to JP2007255809A priority patent/JP2009042712A/en
Priority to US12/116,532 priority patent/US20090040419A1/en
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    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • G02F1/133602Direct backlight
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406Control of illumination source
    • G09G3/342Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
    • G09G3/3426Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines the different display panel areas being distributed in two dimensions, e.g. matrix
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • G02F1/133625Electron stream lamps
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00Command of the display device
    • G09G2310/02Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/024Scrolling of light from the illumination source over the display in combination with the scanning of the display screen
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/06Adjustment of display parameters
    • G09G2320/0626Adjustment of display parameters for control of overall brightness
    • G09G2320/0633Adjustment of display parameters for control of overall brightness by amplitude modulation of the brightness of the illumination source
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/06Adjustment of display parameters
    • G09G2320/0626Adjustment of display parameters for control of overall brightness
    • G09G2320/064Adjustment of display parameters for control of overall brightness by time modulation of the brightness of the illumination source
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/06Adjustment of display parameters
    • G09G2320/0626Adjustment of display parameters for control of overall brightness
    • G09G2320/0646Modulation of illumination source brightness and image signal correlated to each other
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611Control of matrices with row and column drivers
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611Control of matrices with row and column drivers
    • G09G3/3648Control of matrices with row and column drivers using an active matrix

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Nonlinear Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Mathematical Physics (AREA)
  • Optics & Photonics (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Liquid Crystal (AREA)

Abstract

본 발명은 복수의 게이트 전극과 복수의 캐소드 전극이 교차되며, 상기 게이트 전극과 상기 캐소드 전극의 전압에 대응하여 전자를 방출하며, 방출된 전자가 애노드 전극에 부딪혀 발광하는 광원부; 스캔신호를 생성하여 상기 게이트 전극에 전달하는 게이트 구동부; 및 영상신호에 대응하는 캐소드 구동신호를 생성하여 상기 캐소드 전극에 데이터신호를 전달하는 캐소드 구동부를 포함하되, 상기 캐소드 구동부에서 발생되는 상기 캐소드 구동신호는 한 수직동기시간 내에 복수의 펄스파형으로 전달되되, 상기 복수의 펄스파형 중 두번째 펄스파형의 라이징 구간은 첫번째 펄스파형의 폴링구간과 교차되도록 전달되는 전자방출표시소자 및 이를 이용한 액정표시장치를 제공하는 것이다. According to an embodiment of the present invention, a plurality of gate electrodes and a plurality of cathode electrodes intersect each other, and emit light in response to voltages of the gate electrode and the cathode, and the emitted electrons strike an anode electrode to emit light; A gate driver configured to generate a scan signal and transmit the scan signal to the gate electrode; And a cathode driving unit configured to generate a cathode driving signal corresponding to the image signal and to transmit a data signal to the cathode electrode, wherein the cathode driving signal generated by the cathode driving unit is transmitted as a plurality of pulse waveforms within one vertical synchronous time. The rising period of the second pulse waveform among the plurality of pulse waveforms provides an electron emission display device which is transmitted to intersect with the polling period of the first pulse waveform, and a liquid crystal display device using the same.

Description

전자방출소자 및 이를 이용한 액정표시장치{ELECTRON EMISSION DEVICE FOR BACK LIGHT UNIT AND LIQUID CRYSTAL DISPLAY THEREOF}ELECTRON EMISION DEVICE FOR BACK LIGHT UNIT AND LIQUID CRYSTAL DISPLAY THEREOF

본 발명은 전자방출소자 및 이를 이용한 액정표시장치에 관한 것으로, 더욱 상세히 설명하면, 잔광시간을 이용하여 발광효율을 높일 수 있도록 하는 전자방출소자 및 이를 이용한 액정표시장치에 관한 것이다. The present invention relates to an electron emitting device and a liquid crystal display using the same, and more particularly, to an electron emitting device and a liquid crystal display using the same to increase the luminous efficiency using the afterglow time.

평판 표시장치는 기판 상에 매트릭스 형태로 복수의 화소를 배치하여 표시영역으로 하고, 각 화소에 주사선과 데이터선을 연결하여 화소에 데이터신호를 선택적으로 인가하여 디스플레이를 한다. In a flat panel display, a plurality of pixels are arranged on a substrate to form a display area, and a scan line and a data line are connected to each pixel to selectively apply a data signal to the pixel for display.

평판 표시장치는 화소의 구동방식에 따라 패시브(Passive) 매트릭스형 표시장치와 액티브(Active)매트릭스형 표시장치로 구분되며, 해상도, 콘트라스트, 동작속도의 관점에서 단위 화소 마다 선택하여 점등하는 액티브 매트릭스형이 주류가 되고 있다. The flat panel display device is classified into a passive matrix display device and an active matrix display device according to the driving method of the pixel, and is an active matrix type that is selected and lit for each unit pixel in view of resolution, contrast, and operation speed. This is becoming mainstream.

이러한 평판 표시장치는 퍼스널 컴퓨터, 휴대전화기, PDA 등의 휴대 정보단말기 등의 표시장치나 각종 정보기기의 모니터로서 사용되고 있으며, 액정 패널을 이용한 액정표시장치, 유기발광소자를 이용항 유기전계발광표시장치, 플라즈마 패 널을 이용한 PDP 및 전자방출소자를 이용한 전자방출표시장치 등이 알려져 있다. 또한, 평판 표시장치 중 전자방출표시장치는 액정표시장치의 백라이트부으로 사용할 수도 있다. Such a flat panel display is used as a display device such as a personal information terminal such as a personal computer, a mobile phone, a PDA, or a monitor of various information devices. The liquid crystal display device using a liquid crystal panel and an organic light emitting display device using an organic light emitting device are used. For example, PDPs using plasma panels and electron emission display devices using electron emitting devices are known. In addition, the electron emission display device of the flat panel display device may be used as a backlight unit of the liquid crystal display device.

도 1은 일반적인 패시브 매트릭스형 평판 디스플레이 패널에서 입력되는 입력파형을 나타내는 파형도이다. 도 1을 참조하여 설명하면, 패시브 매트릭스형 평판 디스플레이 패널은 첫번째 수직동기신호(Vsync)신호가 입력된 후 두번째 수직동기신호(Vsync)가 입력되는 시간에 대응하여 한 프레임의 시간이 결정되며, 한 프레임의 시간 내에 주사신호(Sn)가 전달되며 주사신호(Sn)가 전달된 화소에 데이터신호(data)를 전달하여 화소가 데이터신호(data)에 대응하여 발광하도록 한다. 1 is a waveform diagram illustrating an input waveform input from a general passive matrix flat panel display panel. Referring to FIG. 1, in the passive matrix flat panel display panel, a time of one frame is determined in response to a time when the second vertical sync signal Vsync is input after the first vertical sync signal Vsync signal is input. The scan signal Sn is transmitted within the frame time and the data signal data is transmitted to the pixel to which the scan signal Sn is transmitted so that the pixel emits light corresponding to the data signal data.

이때, 계조표현을 하기 위해 스캔신호의 펄스파의 폭을 조절하는 방법인 펄스폭 변조방식(Pulse Width Modulation)을 이용한다. 즉, 밝은 계조를 표현하기 위해서는 스캔신호의 펄스폭을 길게하고 어두운 계조를 표현하기 위해서는 스캔신호의 펄스폭을 짧게하여 발광시간에 따라 계조가 표현되게 된다. At this time, in order to express the gray scale, a pulse width modulation method, which is a method of adjusting the width of the pulse wave of the scan signal, is used. That is, the pulse width of the scan signal is increased to express the bright gray level, and the pulse width of the scan signal is shortened to express the dark gray level, so that the gray level is expressed according to the emission time.

상기와 같은 방식을 이용하여 전자방출표시소자를 구동하게 되는 경우 전자방출표시소자는 게이트 전극, 캐소드 전극의 전압 차이에 대응하여 전자를 방출하며 방출된 전자가 형광막이 형성된 애노드 기판에 부딪혀 빛을 발광하게 된다. 이때, 게이트 전극, 캐소드 전극 및 애노드 기판에는 고전압이 인가되어 밝은 계조를 표현하기 위해 발광시간을 증가하는 경우 게이트 전극, 캐소드 전극 및 애노드 기판에 고전압에 의한 손상이 우려되어 수명이 전자방출표시소자의 수명이 떨어지는 문제점이 있다. When the electron emission display device is driven using the above method, the electron emission display device emits electrons in response to the voltage difference between the gate electrode and the cathode electrode, and the emitted electrons strike the anode substrate on which the fluorescent film is formed to emit light. Done. In this case, when a high voltage is applied to the gate electrode, the cathode electrode, and the anode substrate, and the emission time is increased to express bright gray levels, the gate electrode, the cathode electrode, and the anode substrate may be damaged by the high voltage, and thus the lifespan of the electron emission display device may be increased. There is a problem that the life is short.

본 발명의 목적은 패시브 매트릭스형 평판표시장치에서 발광효율을 높일 수 있도록 수직동기시간 내에 전달되는 게이트 신호를 복수개의 펄스로 분할하여 펄스와 펄스 사이에 펄스의 하강시간에 의해 게이트 전극에 소정의 전압이 유지되는 것을 이용하여 게이트 전극에 신호가 전달되는 시간을 줄여 발광효율이 높아지고 에미터의 수명이 증가되게 하는 전자방출표시소자 및 이를 이용한 액정표시장치를 제공하는 것이다. Disclosure of Invention An object of the present invention is to divide a gate signal transmitted within a vertical synchronous time into a plurality of pulses so as to increase luminous efficiency in a passive matrix flat panel display device, and thus a predetermined voltage is applied to the gate electrode by a falling time of the pulse between the pulse and the pulse. It is to provide an electron emission display device and a liquid crystal display device using the same to reduce the time the signal is transmitted to the gate electrode by using this maintained to increase the luminous efficiency and the lifetime of the emitter.

상기 목적을 달성하기 위하여 본 발명에 따른 전자방출표시소자는, 복수의 게이트 전극과 복수의 캐소드 전극이 교차되며, 상기 게이트 전극과 상기 캐소드 전극의 전압에 대응하여 전자를 방출하며, 방출된 전자가 애노드 전극에 부딪혀 발광하는 광원부; 스캔신호를 생성하여 상기 게이트 전극에 전달하는 게이트 구동부; 및 영상신호에 대응하는 캐소드 구동신호를 생성하여 상기 캐소드 전극에 데이터신호를 전달하는 캐소드 구동부를 포함하되, 상기 캐소드 구동부에서 발생되는 상기 캐소드 구동신호는 한 수직동기시간 내에 복수의 펄스파형으로 전달되되, 상기 복수의 펄스파형 중 두번째 펄스파형의 라이징 구간은 첫번째 펄스파형의 폴링구간과 교차되도록 전달되는 전자방출표시소자를 제공하는 것이다. In order to achieve the above object, the electron emission display device according to the present invention includes a plurality of gate electrodes and a plurality of cathode electrodes intersecting each other, emitting electrons in response to the voltages of the gate electrode and the cathode electrode, A light source unit which strikes the anode electrode and emits light; A gate driver configured to generate a scan signal and transmit the scan signal to the gate electrode; And a cathode driving unit configured to generate a cathode driving signal corresponding to the image signal and to transmit a data signal to the cathode electrode, wherein the cathode driving signal generated by the cathode driving unit is transmitted as a plurality of pulse waveforms within one vertical synchronous time. The rising period of the second pulse waveform among the plurality of pulse waveforms provides an electron emission display device which is transmitted to intersect with the polling period of the first pulse waveform.

상기 목적을 달성하기 위하여 본 발명에 따른 전자방출표시소자는, 복수의 게이트 전극과 복수의 캐소드 전극이 교차되며, 상기 게이트 전극과 상기 캐소드 전극의 전압에 대응하여 전자를 방출하며, 방출된 전자가 애노드 전극에 부딪혀 발광하는 광원부; 스캔신호를 생성하여 상기 게이트 전극에 전달하는 게이트 구동부; 및 영상신호에 대응하는 캐소드 구동신호를 생성하여 상기 캐소드 전극에 데이터신호를 전달하는 캐소드 구동부를 포함하되, 상기 게이트 구동부에서 발생되는 상기 게이트 구동신호는 한 수직동기시간 내에 복수의 펄스파형으로 전달되되, 상기 복수의 펄스파형 중 두번째 펄스파형의 라이징 구간은 첫번째 펄스파형의 폴링구간과 교차되도록 전달되는 전자방출표시소자를 제공하는 것이다.
상기 목적을 달성하기 위하여 본 발명의 액정표시장치는, 복수의 액정셀을 포함하며, 데이터신호와 주사신호에 의해 선택적으로 전달받은 광원을 투과 또는 차단하여 화상을 표현하는 화소부; 상기 화소부에 상기 데이터신호를 전달하는 데이터구동부; 상기 화소부에 상기 주사신호를 전달하는 주사구동부; 및 상기 화소부에 상기 광원을 전달하는 백라이트부를 포함하되, 상기 백라이트부는 복수의 게이트 전극과 복수의 캐소드 전극이 교차되며, 상기 게이트 전극과 상기 캐소드 전극의 전압에 대응하여 전자를 방출하며, 방출된 전자가 애노드 전극에 부딪혀 발광하는 광원부; 스캔신호를 생성하여 상기 게이트 전극에 전달하는 게이트 구동부; 및 영상신호에 대응하는 캐소드 구동신호를 생성하여 상기 캐소드 전극에 상기 데이터신호를 전달하는 캐소드 구동부를 포함하되, 상기 캐소드 구동부에서 발생되는 상기 캐소드 구동신호는 한 수직동기시간 내에 복수의 펄스파형으로 전달되되, 상기 복수의 펄스파형 중 두번째 펄스파형의 라이징 구간은 첫번째 펄스파형의 폴링구간과 교차되도록 전달되는 액정표시장치를 제공하는 것이다.
In order to achieve the above object, the electron emission display device according to the present invention includes a plurality of gate electrodes and a plurality of cathode electrodes intersecting each other, emitting electrons in response to the voltages of the gate electrode and the cathode electrode, A light source unit which strikes the anode electrode and emits light; A gate driver configured to generate a scan signal and transmit the scan signal to the gate electrode; And a cathode driver configured to generate a cathode driving signal corresponding to the image signal and to transmit a data signal to the cathode electrode, wherein the gate driving signal generated by the gate driver is transmitted as a plurality of pulse waveforms within one vertical synchronous time. The rising period of the second pulse waveform among the plurality of pulse waveforms provides an electron emission display device which is transmitted to intersect with the polling period of the first pulse waveform.
According to an aspect of the present invention, there is provided a liquid crystal display device including: a pixel unit including a plurality of liquid crystal cells and displaying an image by transmitting or blocking a light source selectively transmitted by a data signal and a scan signal; A data driver transferring the data signal to the pixel unit; A scan driver transferring the scan signal to the pixel unit; And a backlight unit configured to transmit the light source to the pixel unit, wherein the backlight unit crosses a plurality of gate electrodes and a plurality of cathode electrodes, emits electrons corresponding to voltages of the gate electrode and the cathode electrode, and is emitted. A light source unit in which electrons strike the anode electrode and emit light; A gate driver configured to generate a scan signal and transmit the scan signal to the gate electrode; And a cathode driver configured to generate a cathode driving signal corresponding to an image signal and to transmit the data signal to the cathode electrode, wherein the cathode driving signal generated by the cathode driver is transmitted as a plurality of pulse waveforms within one vertical synchronous time. Accordingly, the rising period of the second pulse waveform among the plurality of pulse waveforms is provided to the liquid crystal display device which is transmitted to intersect with the polling period of the first pulse waveform.

상기 목적을 달성하기 위하여 본 발명의 액정표시장치는, 복수의 액정셀을 포함하며, 데이터신호와 주사신호에 의해 선택적으로 전달받은 광원을 투과 또는 차단하여 화상을 표현하는 화소부; 상기 화소부에 상기 데이터신호를 전달하는 데이터구동부; 상기 화소부에 상기 주사신호를 전달하는 주사구동부; 및 상기 화소부에 상기 광원을 전달하는 백라이트부를 포함하되, 상기 백라이트부는 복수의 게이트 전극과 복수의 캐소드 전극이 교차되며, 상기 게이트 전극과 상기 캐소드 전극의 전압에 대응하여 전자를 방출하며, 방출된 전자가 애노드 전극에 부딪혀 발광하는 광원부; 스캔신호를 생성하여 상기 게이트 전극에 전달하는 게이트 구동부; 및 영상신호에 대응하는 캐소드 구동신호를 생성하여 상기 캐소드 전극에 상기 데이터신호를 전달하는 캐소드 구동부를 포함하되, 상기 게이트구동부에서 발생되는 상기 스캔신호는 한 수직동기시간 내에 복수의 펄스파형으로 전달되되, 상기 복수의 펄스파형 중 두번째 펄스파형의 라이징 구간은 첫번째 펄스파형의 폴링구간과 교차되도록 전달되는 액정표시장치를 제공하는 것이다. According to an aspect of the present invention, there is provided a liquid crystal display device including: a pixel unit including a plurality of liquid crystal cells and displaying an image by transmitting or blocking a light source selectively transmitted by a data signal and a scan signal; A data driver transferring the data signal to the pixel unit; A scan driver transferring the scan signal to the pixel unit; And a backlight unit configured to transmit the light source to the pixel unit, wherein the backlight unit crosses a plurality of gate electrodes and a plurality of cathode electrodes, emits electrons corresponding to voltages of the gate electrode and the cathode electrode, and is emitted. A light source unit in which electrons strike the anode electrode and emit light; A gate driver configured to generate a scan signal and transmit the scan signal to the gate electrode; And a cathode driver configured to generate a cathode driving signal corresponding to an image signal and to transfer the data signal to the cathode electrode, wherein the scan signal generated by the gate driver is transmitted as a plurality of pulse waveforms within one vertical synchronization time. The rising period of the second pulse waveform among the plurality of pulse waveforms is provided to provide a liquid crystal display device which is transmitted to intersect with the polling period of the first pulse waveform.

삭제delete

상기 목적을 달성하기 위하여 본 발명에 따른 액정표시장치의 구동방법은, 액정셀에 데이터신호와 주사신호에 의해 광원을 투과율을 조절하여 화상을 표현하는 액정표시장치의 구동방법에 있어서, 주사신호와 데이터신호가 상기 액정셀에 전달되어 한 프레임의 시간 동안 상기 데이터신호가 유지되는 단계; 및 한 프레임 시간 중 액정셀이 유지되는 시간 동안 백라이트부에서 생성된 상기 광원이 복수의 펄스 형태로 전달되되, 상기 복수의 펄스 중 두번째 펄스의 라이징 구간은 첫번째 펄스의 폴링구간과 교차되도록 전달되는 액정표시장치의 구동방법을 제공하는 것이다. In order to achieve the above object, a driving method of a liquid crystal display device according to the present invention is a driving method of a liquid crystal display device in which a light source is controlled by a data signal and a scanning signal in a liquid crystal cell to express an image, wherein the scanning signal and Transmitting a data signal to the liquid crystal cell to maintain the data signal for one frame of time; And the light source generated in the backlight unit during a time period during which the liquid crystal cell is maintained during one frame time, is transferred in a plurality of pulse forms, and the rising period of the second pulse among the plurality of pulses is transmitted to cross the polling period of the first pulse. It is to provide a method of driving a display device.

본 발명에 따른 전자방출표시소자를 및 이를 이용한 액정표시장치에 의하면, 전자방출표시소자를 액정표시장치의 백라이트부로 사용할 수 있으며, 전자방출표시소자의 애노드 전극의 발열이 감소되고 발광효율이 향상되며, 에미터의 수명이 향상되게 된다. 또한, 액정표시장치의 백라이트부에서 계조표현을 하는 것도 가능하 다. According to the electron emission display device and the liquid crystal display device using the same according to the present invention, the electron emission display device can be used as the backlight of the liquid crystal display device, the heat generation of the anode electrode of the electron emission display device is reduced and the luminous efficiency is improved. The life of the emitter will be improved. It is also possible to express gradation in the backlight of the liquid crystal display.

이하, 본 발명의 실시예를 첨부한 도면을 참조하여 설명하면 다음과 같다. Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

도 2는 본 발명에 따른 전자방출표시소자의 구조를 나타내는 구조도이다. 도 2를 참조하여 설명하면, 전자방출표시장치는 광원부(10a), 캐소드 구동부(20a) 및 게이트 구동부(30a)를 포함한다. 2 is a structural diagram showing a structure of an electron emission display device according to the present invention. Referring to FIG. 2, the electron emission display device includes a light source unit 10a, a cathode driver 20a, and a gate driver 30a.

광원부(10a)는 캐소드 전극(C1,C2...Cn)과 게이트 전극(G1,G2...Gn)이 교차하는 부분에 복수의 광원(11a)이 형성되며 캐소드 전극(C1,C2...Cn)에서 방출된 전자가 애노드에 충돌하여 형광체가 발광함으로써 빛을 발광한다. 빛을 발광하는 양은 캐소드 전극(C1,C2...Cn)에서 방출된 전자의 양에 따라 결정되며 영상신호의 계조값에 대응하여 결정된다. In the light source unit 10a, a plurality of light sources 11a are formed at portions where the cathode electrodes C1, C2 ... Cn and the gate electrodes G1, G2 ... Gn intersect, and the cathode electrodes C1, C2 ... The electrons emitted by .Cn) collide with the anode and the phosphor emits light, thereby emitting light. The amount of light emitted is determined in accordance with the amount of electrons emitted from the cathode electrodes C1, C2 ... Cn and corresponds to the gray value of the image signal.

캐소드구동부(20a)는 캐소드 전극(C1,C2...Cn)과 연결되며 영상신호를 전달받아 캐소드신호를 생성하여 광원부(10a)에 전달한다. The cathode driver 20a is connected to the cathode electrodes C1, C2 ... Cn, receives an image signal, generates a cathode signal, and transmits the cathode signal to the light source unit 10a.

게이트구동부(30a)는 게이트 전극(G1,G2...Gn)과 연결되어 게이트신호를 생성하여 광원부(10a)에 전달하여 광원부(10a)를 라인 스캔 방식으로 수평라인 단위로 일정시간씩 순차적으로 발광시킴으로서 전체 화면을 표시하는 방식으로 회로 원가 및 소비전력을 줄이면서 구동할 수 있다. The gate driver 30a is connected to the gate electrodes G1, G2 ... Gn, generates a gate signal, and transmits the gate signal to the light source unit 10a so that the light source unit 10a is sequentially lined by a horizontal line unit by a line scan method. By emitting light, it can be driven while reducing the circuit cost and power consumption by displaying the entire screen.

도 3은 본 발명에 따른 액정표시장치를 나타내는 구조도이다. 도 3을 참조 하여 설명하면, 액정표시장치는 화소부(100), 데이터구동부(200), 주사구동부(300), 백라이트부(400)을 구비한다. 3 is a structural diagram showing a liquid crystal display according to the present invention. Referring to FIG. 3, the liquid crystal display device includes a pixel unit 100, a data driver 200, a scan driver 300, and a backlight unit 400.

화소부(100)는 복수의 데이터선(D1,D2...Dm)과 복수의 주사선(S1,S2,...Sn)이 교차하며 복수의 데이터선(D1,D2...Dm)과 복수의 주사선(S1,S2,...Sn)이 교차되는 영역에 복수의 화소(101)가 형성된다. 하나의 화소는 하나의 액정셀이 대응되며, 액정셀은 데이터선(D1,D2...Dm)과 주사선(S1,S2,...Sn)에 의해 데이터신호와 주사신호를 전달받아 액정셀의 액정의 배열을 조절하여 빛을 투과하거나 차단하여 화상을 표현할 수 있도록 한다. 그리고, 화소부(100)는 복수의 블럭으로 구분되어 블럭단위로 별도의 광원을 전달받아 화상을 표현할 수 있도록 하여 밝은 화상을 표현하는 블럭은 밝은 광원으로부터 빛을 전달받고 어두운화상을 표현하는 블럭은 어두운 광원으로부터 빛을 전달받아 한 화면에서 어두운부분과 밝은 부분을 별도의 밝기로 조절할 수 있도록 한다. The pixel portion 100 has a plurality of data lines D1, D2 ... Dm and a plurality of scan lines S1, S2, ... Sn intersecting and a plurality of data lines D1, D2 ... Dm. A plurality of pixels 101 are formed in an area where the plurality of scan lines S1, S2, ... Sn intersect. One pixel corresponds to one liquid crystal cell, and the liquid crystal cell receives the data signal and the scan signal by the data lines D1, D2 ... Dm and the scan lines S1, S2, ... Sn. Adjust the arrangement of the liquid crystal to transmit or block the light so that the image can be expressed. In addition, the pixel unit 100 is divided into a plurality of blocks so that a separate light source can be received in units of blocks to represent an image, and thus a block representing a bright image receives light from a bright light source and a block representing a dark image. It receives light from a dark light source so that the dark and bright parts of a screen can be adjusted to separate brightness.

데이터구동부(200)는 복수의 데이터선(D1,D2...Dm)과 연결되어 복수의 데이터선(D1,D2...Dm)에 데이터신호를 전달하여 데이터신호가 화소(101)에 전달될 수 있도록 한다. The data driver 200 is connected to the plurality of data lines D1, D2 ... Dm to transfer data signals to the plurality of data lines D1, D2 ... Dm, thereby transferring the data signals to the pixels 101. To be possible.

주사구동부(200)는 복수의 주사선(S1,S2,...Sn)과 연결되어 복수의 주사선(S1,S2,...Sn)에 주사신호를 전달하며 주사신호에 의해 선택된 화소(101)에 데이터신호가 전달될 수 있도록 한다. The scan driver 200 is connected to the plurality of scan lines S1, S2,... Sn to transfer scan signals to the plurality of scan lines S1, S2, ... Sn, and is selected by the scan signal. To allow the data signal to be transmitted.

백라이트부(400)는 빛을 생성하여 화소부에 전달하여 화소부(100)의 각각의 액정셀에서 백라이트부(400)에서 생성된 빛을 투과 또는 차단하여 영상을 표현할 수 있도록 한다. 이때, 백라이트부(400)는 도 2에 도시된 복수의 전자방출표시소자를 포함하는 전자방출표시장치로 구성할 수 있으며, 복수의 전자방출표시소자가 복수의 광원으로 되어 각 광원이 하나의 블럭에 대응되어 블럭단위로 빛을 전달받을 수 있도록 한다. 그리고, 전자방출표시소자는 탄소나노튜브(CNT)를 포함한다. The backlight unit 400 generates light and transmits the light to the pixel unit to transmit or block the light generated by the backlight unit 400 in each liquid crystal cell of the pixel unit 100 to express an image. In this case, the backlight unit 400 may be configured as an electron emission display device including a plurality of electron emission display elements shown in FIG. 2, and the plurality of electron emission display elements may be a plurality of light sources, and each light source may be one block. Corresponds to, so that light can be transmitted in units of blocks. The electron emission display device includes carbon nanotubes (CNTs).

그리고, 백라이트부(400)는 화소부(100)가 한 프레임 구간 동안 발광하는 휘도에 대응하여 전체휘도를 조절할 수 있도록 한다. 즉, 한 프레임 구간동안 화소부의 각 화소에서 고휘도를 표현하는 화소가 많은 경우에 백라이트부(400)는 소정의 휘도보다 낮은 휘도로 발광하게 되고, 화소부(100)의 각 화소에서 저휘도를 표현하는 화소가 많은 경우에 백라이트부(400)는 소정의 휘도보다 높은 휘도로 발광하도록 한다. 따라서, 화소부(100)가 높은 휘도로 발광하는 경우에 백라이트부(400)의 휘도를 낮춰 표현되는 휘도를 일정정도 낮게 하여 눈부심을 방지하도록 하고 화소부(100)가 저휘도로 발광하는 경우 휘도를 일정정도 높게 하여 명암비를 높여 시인성이 높아질 수 있도록 한다. 그리고, 고휘도로 발광하게 되는 경우 휘도를 일정정도 낮게 하여 소비전력을 줄일 수 있게 된다. In addition, the backlight unit 400 may adjust the overall luminance in response to the luminance emitted by the pixel unit 100 during one frame period. That is, when there are many pixels expressing high luminance in each pixel of the pixel unit during one frame period, the backlight unit 400 emits light with a lower brightness than a predetermined luminance, and expresses low luminance in each pixel of the pixel unit 100. When there are many pixels, the backlight unit 400 emits light with a luminance higher than a predetermined luminance. Therefore, when the pixel unit 100 emits light with high luminance, the luminance of the backlight unit 400 is lowered to a certain level to prevent glare, and when the pixel unit 100 emits low luminance, the luminance is reduced. Increase the contrast ratio to some degree to increase the visibility. In the case of emitting light with high brightness, power consumption can be reduced by lowering the luminance to some extent.

도 4는 본 발명에 따른 전자방출표시소자에서 빛을 발광하는 개념을 나타내는 파형도이다. 도 4를 참조하여 설명하면, 캐소드 전극 또는 게이트 전극에 a에 도시되어 있는 것과 같이 구형파 형태의 파형이 전달되더라도 광원부에 있는 저항성분과 캐패시터 성분에 의해 신호지연이 발생하게 되어 b에 도시되어 있는 것과 같이 상승시간과 하강시간이 나타나게 되어 입력신호가 인가되는 사긴보다 더 긴 시간 동안 캐소드 전극 또는 게이트 전극에 신호가 인가된다. 따라서, 본 발명은 입력되는 신호가 저항성분과 캐패시터성분에 의해 하강시간이 나타나는 것을 이용하는 것으로, 하강시간에도 캐소드 전극 또는 게이트 전극에 신호가 전달되므로 전자방출표시소자는 전자를 지속하여 방출하여 발광하게 된다. 즉, 발광시간 동안 하나의 펄스를 전달하는 것보다 복수의 펄스를 전달할 때 하강시간에 의해 캐소드 전극 또는 게이트 전극에 전압이 인가되는 시간이 더 짧아지게 되며, 애노드 기판에 전자자 충돌하는 시간도 더 짧게 되어 캐소드 전극, 게이트전극 및 애노드 기판이 손상되는 것을 줄여 수명을 증가시킬 수 있게 된다. 4 is a waveform diagram illustrating a concept of emitting light in an electron emission display device according to an exemplary embodiment of the present invention. Referring to FIG. 4, even when a waveform in the form of a square wave is transmitted to a cathode electrode or a gate electrode as shown in a, signal delay is generated by a resistance component and a capacitor component in the light source unit, as shown in b. The rise time and fall time are shown so that the signal is applied to the cathode electrode or the gate electrode for a longer time than the photo signal to which the input signal is applied. Therefore, the present invention uses the falling time of the input signal due to the resistance component and the capacitor component. Since the signal is transmitted to the cathode electrode or the gate electrode even during the falling time, the electron emission display device emits light by continuously emitting electrons. . In other words, when a plurality of pulses are delivered than a single pulse during the light emission time, the time for applying a voltage to the cathode electrode or the gate electrode is shortened by the fall time, and the time of the electron collision with the anode substrate is further shortened. This shortens the life of the cathode electrode, the gate electrode and the anode substrate by reducing damage.

도 5는 본 발명에 따른 액정표시장치에 입력되는 신호의 파형을 나타내는 파형도이다. LCD 신호는 액정셀에 인가되는 신호이고, LCD 응답은 액정셀이 반응하여 색을 표현하는 시간을 나타내며, 게이트신호는 게이트구동부에서 출력되는 게이트신호의 파형을 나타내며, 게이트 응답은 게이트 구동부에서 출력된 게이트신호가 게이트 전극에 전달되는 파형을 나타낸다. 5 is a waveform diagram illustrating a waveform of a signal input to a liquid crystal display according to the present invention. The LCD signal is a signal applied to the liquid crystal cell, the LCD response represents the time when the liquid crystal cell reacts to express color, the gate signal represents the waveform of the gate signal output from the gate driver, and the gate response is output from the gate driver. The waveform of the gate signal transmitted to the gate electrode is shown.

도 5를 참조하여 설명하면, 액정셀은 한 프레임의 시간 동안 데이터신호 등이 액정셀에 인가된다. 하지만, 액정셀은 인가되는 신호에 대응하여 동작할 때 반당에 필요한 소의 시간이 필요하게 된다. 따라서, 액정이 유지되는 시간은 한 프레임 시간 동안의 일부가 된다. 그리고, 액정표시장치의 백라이트부로 사용되는 전자방출표시소자에서 액정이 유지되는 시간 동안 게이트 신호가 복수의 펄스파 형태로 출력되면, 도 4에 설명에 의한 것과 같이 게이트 응답에는 전극에 전달되는 신호에 지연이 발생되어 게이트 전극에 신호가 인가되는 시간이 증가하게 된다. 게이트 전극에는 신호가 전달되면 전자방출표시소자는 게이트 전극과 캐소드 전극의 전압차이에 의해 전자를 방출하게 되어 발광시간이 증가하게 된다. Referring to FIG. 5, in the liquid crystal cell, a data signal or the like is applied to the liquid crystal cell for one frame of time. However, the liquid crystal cell needs a small amount of time required for half operation when operating in response to an applied signal. Therefore, the time for which the liquid crystal is maintained becomes part of one frame time. When the gate signal is output in the form of a plurality of pulse waves during the time that the liquid crystal is maintained in the electron emission display device used as the backlight unit of the liquid crystal display device, as shown in FIG. 4, the gate response is applied to the signal transmitted to the electrode. Delays occur to increase the time that the signal is applied to the gate electrode. When a signal is transmitted to the gate electrode, the electron emission display device emits electrons due to the voltage difference between the gate electrode and the cathode electrode, thereby increasing the emission time.

또한, 영상신호에 대응하여 게이트 구동부에서 출력되는 게이트 신호의 전압을 조절하면 전자방출표시소자는 계조표현도 가능하게 된다. In addition, when the voltage of the gate signal output from the gate driver is adjusted in response to the image signal, the electron emission display device may also display gray scales.

본 발명의 바람직한 실시예가 특정 용어들을 사용하여 기술되어 왔지만, 그러한 기술은 단지 설명을 하기 위한 것이며, 다음의 청구범위의 기술적 사상 및 범위로부터 이탈되지 않고 여러 가지 변경 및 변화가 가해질 수 있는 것으로 이해되어져야 한다. While preferred embodiments of the present invention have been described using specific terms, such descriptions are for illustrative purposes only and it is understood that various changes and modifications may be made without departing from the spirit and scope of the following claims. You must lose.

도 1은 일반적인 패시브 매트릭스형 평판 디스플레이 패널에서 입력되는 입력파형을 나타내는 파형도이다.1 is a waveform diagram illustrating an input waveform input from a general passive matrix flat panel display panel.

도 2는 본 발명에 따른 전자방출표시소자의 구조를 나타내는 구조도이다. 2 is a structural diagram showing a structure of an electron emission display device according to the present invention.

도 3은 본 발명에 따른 액정표시장치를 나타내는 구조도이다. 3 is a structural diagram showing a liquid crystal display according to the present invention.

도 4는 본 발명에 따른 전자방출표시소자에서 빛을 발광하는 개념을 나타내는 파형도이다. 4 is a waveform diagram illustrating a concept of emitting light in an electron emission display device according to an exemplary embodiment of the present invention.

도 5는 본 발명에 따른 액정표시장치에 입력되는 신호의 파형을 나타내는 파형도이다. 5 is a waveform diagram illustrating a waveform of a signal input to a liquid crystal display according to the present invention.

Claims (11)

복수의 게이트 전극과 복수의 캐소드 전극이 교차되며, 상기 게이트 전극과 상기 캐소드 전극의 전압에 대응하여 전자를 방출하며, 방출된 전자가 애노드 전극에 부딪혀 발광하는 광원부; A light source unit intersecting a plurality of gate electrodes and a plurality of cathode electrodes, emitting electrons corresponding to the voltages of the gate electrode and the cathode electrode, and emitting the electrons by hitting the anode electrode to emit light; 스캔신호를 생성하여 상기 게이트 전극에 전달하는 게이트 구동부; 및A gate driver configured to generate a scan signal and transmit the scan signal to the gate electrode; And 영상신호에 대응하는 캐소드 구동신호를 생성하여 상기 캐소드 전극에 데이터신호를 전달하는 캐소드 구동부를 포함하되, A cathode driving unit generating a cathode driving signal corresponding to an image signal and transferring a data signal to the cathode; 상기 캐소드 구동부에서 발생되는 상기 캐소드 구동신호는 한 수직동기시간 내에 복수의 펄스파형으로 전달되되, 상기 복수의 펄스파형 중 두번째 펄스파형의 라이징 구간은 첫번째 펄스파형의 폴링구간과 교차되도록 전달되는 전자방출표시소자.The cathode driving signal generated by the cathode driver is transmitted as a plurality of pulse waveforms within one vertical synchronous time, and the rising interval of the second pulse waveform among the plurality of pulse waveforms is transmitted to cross the polling section of the first pulse waveform. Display element. 삭제delete 제 1 항에 있어서, The method of claim 1, 상기 영상신호의 계조는 상기 캐소드 구동신호의 펄스폭에 대응하여 조절되는 전자방출표시소자. And the gray level of the image signal is adjusted according to the pulse width of the cathode driving signal. 복수의 게이트 전극과 복수의 캐소드 전극이 교차되며, 상기 게이트 전극과 상기 캐소드 전극의 전압에 대응하여 전자를 방출하며, 방출된 전자가 애노드 전극에 부딪혀 발광하는 광원부; A light source unit intersecting a plurality of gate electrodes and a plurality of cathode electrodes, emitting electrons corresponding to the voltages of the gate electrode and the cathode electrode, and emitting the electrons by hitting the anode electrode to emit light; 스캔신호를 생성하여 상기 게이트 전극에 전달하는 게이트 구동부; 및A gate driver configured to generate a scan signal and transmit the scan signal to the gate electrode; And 영상신호에 대응하는 캐소드 구동신호를 생성하여 상기 캐소드 전극에 데이터신호를 전달하는 캐소드 구동부를 포함하되, A cathode driving unit generating a cathode driving signal corresponding to an image signal and transferring a data signal to the cathode; 상기 게이트 구동부에서 발생되는 상기 게이트 구동신호는 한 수직동기시간 내에 복수의 펄스파형으로 전달되되, 상기 복수의 펄스파형 중 두번째 펄스파형의 라이징 구간은 첫번째 펄스파형의 폴링구간과 교차되도록 전달되는 전자방출표시소자.The gate driving signal generated by the gate driver is transmitted as a plurality of pulse waveforms within one vertical synchronous time, and the rising interval of the second pulse waveform among the plurality of pulse waveforms is transmitted to cross the polling section of the first pulse waveform. Display element. 복수의 액정셀을 포함하며, 데이터신호와 주사신호에 의해 선택적으로 전달받은 광원을 투과 또는 차단하여 화상을 표현하는 화소부; A pixel unit including a plurality of liquid crystal cells and displaying an image by transmitting or blocking a light source selectively transmitted by a data signal and a scan signal; 상기 화소부에 상기 데이터신호를 전달하는 데이터구동부;A data driver transferring the data signal to the pixel unit; 상기 화소부에 상기 주사신호를 전달하는 주사구동부; 및A scan driver transferring the scan signal to the pixel unit; And 상기 화소부에 상기 광원을 전달하는 백라이트부를 포함하되, A backlight unit for transmitting the light source to the pixel portion, 상기 백라이트부는 The backlight unit 복수의 게이트 전극과 복수의 캐소드 전극이 교차되며, 상기 게이트 전극과 상기 캐소드 전극의 전압에 대응하여 전자를 방출하며, 방출된 전자가 애노드 전극에 부딪혀 발광하는 광원부; A light source unit intersecting a plurality of gate electrodes and a plurality of cathode electrodes, emitting electrons corresponding to the voltages of the gate electrode and the cathode electrode, and emitting the electrons by hitting the anode electrode to emit light; 스캔신호를 생성하여 상기 게이트 전극에 전달하는 게이트 구동부; 및A gate driver configured to generate a scan signal and transmit the scan signal to the gate electrode; And 영상신호에 대응하는 캐소드 구동신호를 생성하여 상기 캐소드 전극에 상기 데이터신호를 전달하는 캐소드 구동부를 포함하되, A cathode driving unit which generates a cathode driving signal corresponding to an image signal and transfers the data signal to the cathode electrode; 상기 캐소드 구동부에서 발생되는 상기 캐소드 구동신호는 한 수직동기시간 내에 복수의 펄스파형으로 전달되되, 상기 복수의 펄스파형 중 두번째 펄스파형의 라이징 구간은 첫번째 펄스파형의 폴링구간과 교차되도록 전달되는 액정표시장치.The cathode driving signal generated by the cathode driving unit is transmitted as a plurality of pulse waveforms within one vertical synchronizing time, and the rising period of the second pulse waveform among the plurality of pulse waveforms is transmitted to cross the polling section of the first pulse waveform. Device. 삭제delete 제 5 항에 있어서, The method of claim 5, wherein 상기 영상신호의 계조는 상기 데이터신호의 펄스폭에 대응하여 조절되는 액정표시장치.The gray level of the image signal is adjusted in correspondence to the pulse width of the data signal. 삭제delete 복수의 액정셀을 포함하며, 데이터신호와 주사신호에 의해 선택적으로 전달받은 광원을 투과 또는 차단하여 화상을 표현하는 화소부; A pixel unit including a plurality of liquid crystal cells and displaying an image by transmitting or blocking a light source selectively transmitted by a data signal and a scan signal; 상기 화소부에 상기 데이터신호를 전달하는 데이터구동부;A data driver transferring the data signal to the pixel unit; 상기 화소부에 상기 주사신호를 전달하는 주사구동부; 및A scan driver transferring the scan signal to the pixel unit; And 상기 화소부에 상기 광원을 전달하는 백라이트부를 포함하되, A backlight unit for transmitting the light source to the pixel portion, 상기 백라이트부는 The backlight unit 복수의 게이트 전극과 복수의 캐소드 전극이 교차되며, 상기 게이트 전극과 상기 캐소드 전극의 전압에 대응하여 전자를 방출하며, 방출된 전자가 애노드 전극에 부딪혀 발광하는 광원부; A light source unit intersecting a plurality of gate electrodes and a plurality of cathode electrodes, emitting electrons corresponding to the voltages of the gate electrode and the cathode electrode, and emitting the electrons by hitting the anode electrode to emit light; 스캔신호를 생성하여 상기 게이트 전극에 전달하는 게이트 구동부; 및A gate driver configured to generate a scan signal and transmit the scan signal to the gate electrode; And 영상신호에 대응하는 캐소드 구동신호를 생성하여 상기 캐소드 전극에 상기 데이터신호를 전달하는 캐소드 구동부를 포함하되, A cathode driving unit which generates a cathode driving signal corresponding to an image signal and transfers the data signal to the cathode electrode; 상기 게이트구동부에서 발생되는 상기 스캔신호는 한 수직동기시간 내에 복수의 펄스파형으로 전달되되, 상기 복수의 펄스파형 중 두번째 펄스파형의 라이징 구간은 첫번째 펄스파형의 폴링구간과 교차되도록 전달되는 액정표시장치.The scan signal generated by the gate driver is transmitted as a plurality of pulse waveforms within one vertical synchronizing time, and the rising period of the second pulse waveform among the plurality of pulse waveforms is transmitted so as to intersect the polling section of the first pulse waveform. . 액정셀에 데이터신호와 주사신호에 의해 광원을 투과율을 조절하여 화상을 표현하는 액정표시장치의 구동방법에 있어서, In a driving method of a liquid crystal display device for displaying an image by adjusting the transmittance of the light source in accordance with the data signal and the scan signal in the liquid crystal cell, 주사신호와 데이터신호가 상기 액정셀에 전달되어 한 프레임의 시간 동안 상기 데이터신호가 유지되는 단계; 및 Transmitting a scan signal and a data signal to the liquid crystal cell to maintain the data signal for one frame of time; And 한 프레임 시간 중 액정셀이 유지되는 시간 동안 백라이트부에서 생성된 상기 광원이 복수의 펄스 형태로 전달되되, 상기 복수의 펄스 중 두번째 펄스의 라이징 구간은 첫번째 펄스의 폴링구간과 교차되도록 전달되는 액정표시장치의 구동방법.The light source generated by the backlight unit is transmitted in a plurality of pulse forms during the time that the liquid crystal cell is maintained during one frame time, and the rising period of the second pulse among the plurality of pulses is transmitted to cross the polling period of the first pulse. Method of driving the device. 제 10 항에 있어서, The method of claim 10, 상기 백라이트부는 펄스폭 변조방식에 의해 상기 광원의 휘도를 조절하는 것을 특징으로 하는 액정표시장치의 구동방법. And the backlight unit adjusts the brightness of the light source by a pulse width modulation method.
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